User guide

Optics Lens Adapter PL Mount LA-PL-1 (no LDS) 39
11 Optics
ALEXA is equipped with an exchangeable lens mount. By using
different adapters, not only PL-mount lenses are supported, but a wide
range of Cine and still photo lenses.
Note: Lenses must cover an image circle of at least 30 mm diameter to
eliminate the risk of vignetting
11.1 Lens Adapter PL Mount LA-PL-1
(no LDS)
The lens adapter LA-PL-1 is the standard lens mount delivered with
ALEXA. It can be used to attach any PL-mount lens to the camera.
Attaching a lens to the camera
• Twist the bayonet ring handle anti-clockwise as far as it will go.
• Remove the protective lens cap.
• Insert the lens into the lens mount receptacle without catching it
at the edges. One of the four slots on the lens mount must fit over
the index pin in the lens mount receptacle.
• Choose a lens position that gives a good readability of lens
markings.
• Press the lens flat onto the lens mount receptacle.
• Twist the bayonet ring handles clockwise until the lens is
attached.
• Make sure the lens is properly mounted.
Note: When no lens is attached to the camera, use the protective cap to avoid
dust entering the lens cavity.
Note: The sophisticated design principle of the camera’s optical module
delivers outstanding images with a cinematic look and feel, but also makes the
imager sensitive to contamination. Dust particles that have settled on the
sensor cover glass during a lens change may become visible as dark spots in
the output image, similar to lint leaving marks on exposed film. The degree of
this effect depends on the aperture of the lens.